Hoisting device.



No. 768,822. PATENTED AUG. 30, 1904. H. J. SGHMICK.

HOISTING DEVICE.

APPLICATION FILED APR. 5, 1904.

N0 MODEL. 3 SHEETS-SHEET 1.

No. 768,822. PATENTED AUG. 80, 1904. H. J. SGHMICK. HOI STING DEVICE.

APPLICATION FILED APR. 5, 1904. N0 MODEL. 3 BHEETS-SHEET 2.

n I I Patented August 30, 1904.

PATENT EETcE.

HENRY J. SCHMICK, OF HAMBURG, PENNSYLVANIA.

HOISTING DEVICE.-

SPECIFICATION forming part'of Letters iatent No. 768,822, dated August30, 1904.

Application filed April 5, 1904, Serial No. 201,697. (No model.)

To oll whom it may concern:

Be it known that I, HENRY J. SoHMIox, a citizen of the United States,residing at Hamburg, in the county of Berks and State of Pennsylvania,have invented certain new and useful Improvements in Hoisting Devices;and I do hereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to hoisting devices, and has for its object economyin time and construction by dispensing with the multiple pulleys,tackle-blocks, or sheaves usually employed and the application of powerdirectly.

to a member engaged by the chain which serves to hoist the article to bemoved; and the invention consists in certain improvements, which will befully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification,Figure 1 represents a side elevation of a hoisting device embodying myinvention; Fig. 2, averticaltransverse section on line 2 2, Fig. 1; andFig. 3, a vertical broken section on line 3 3, Fig. 2.

Reference being had to the drawings and the designating charactersthereon, 1 indicates a shaft on which is secured a disk or head 2 torevolve therewith as the disk and shaft are rotatedin the presentinstance by a sprocketchain 3 engaging the teeth 4: of a sprocketwheel5, secured to the rear side of the diskand on the opposite side or faceof the disk are one or more radio-helical members 6.

7 indicates a gear-wheel or hoisting member having peripheral teeth 8inclined trans versely of the wheel, a cylindrical projection 9 on oneside, on which a chain or hoisting member 10 is supported, and the chainis held in engagement with the periphery thereof by a lateral projection11 on the inside of the housing, in the face of which projection,adjacent to the projection 9, is a groove 12, in which the links of thechain travel. The wheel 7 is supported on a shaft 13, which in turn issupported in bearings la 14 in the housing 15, which is preferably madeof cast-steel and in two parts connected by lugs l6 and bolts 17.

To effect constant engagement of the outer or working surface 18 of themember 6 with the teeth 8 of the wheel 7, said surface is made angularin transverse section of the member and of a constantly-increasinganglefrom the root or point of engagement 19 on the member with theteeth outward in the revolution of the wheel, and the inner side orsurface 20 of said member is inclined in the same ratio but in thereverse direction to prevent binding of the next tooth thereon as thehead revolves. I

The periphery of the disk 2 is provided with a groove 21 to receiveballs 22, which bear against the inner surface of the extension 23 ofthe housing, and in the end of the collar 24 like balls 25 are insertedto take the thrust on the disk 2 in its engagement with the wheel 7. Theshaft 1 extends through the end 26 of the housing and is secured by aloose collar 27 and a cotter-pin 28, extending through the collar andthe shaft. The hoisting device in the form shown is suspended by a hook29, and the chain 10 is provided with a hook 30.

In the construction shown the weight of the article is sustained by thehoisting member 7, and power to hoist is applied directly thereto by therevoluble disk or head 2, revolved by manual power through the medium ofthe chain 3, thus dispensing with the numerous and superfluous pulleysand tackle usually employed, and the time required to hoist an articleis greatly reduced thereby. The weight of the article being hoisted issustained at any point by contact of the teeth 8 with the angularworking surface 18 of the members 6, which in their engagement are inplanes at a right angle to each other.

Having thus fully described my invention, what I claim is 1. In ahoisting device, a revoluble disk or head provided with a working memberon the face thereof having a working surface of constantly-increasingangularity from the root of the member outward, and means for revolvingsaid disk; in combination with a revoluble member operated by saidworking member, and a hoisting member engaging said revoluble member.

2. In a hoisting device, a revoluble disk or head provided with aworking member having its sides inclined in reverse direction, formingtransversely and engaged by said working member, and a hoisting memberengaging said revoluble member.

4. In a hoisting device, a revoluble disk or head provided with aworking member on the face thereof, a housing surrounding said disk, atball-bearing between the periphery of the disk and said housing, athrust-bearing be tween the collar on the disk and the housing, andmeans for revolving said disk; in combination with a revoluble memberhaving peripheral teeth engaged by said working member, and a hoistingmember engaging said revoluble member.

In testimony whereof 1 aflix my signature in presence of two witnesses.

HENRY J. SCHMICK.

Vitnesses:

J. ED. MILLER, M. H. WVENRIGH.

